<div class="search">
    <div class="row">
        <div class="input-group">
            <input type="text" class="form-control" placeholder="Search for..." 
            (keyup)="keyUpseach($event)"
            (change)="keyUpseach($event)"
            [(ngModel)]="searchString">
            <span class="input-group-btn">
        <button class="btn btn-default" type="button">Go!</button>
        </span>
        </div>
    </div>
</div>